Scouring-machine.



C. H. SCOTT.

scoumre MACHINE. APPLICATION FILED APR. 29, 1911.

Patented Nov. 9, 1912.

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COLUMBIA PLANOGRAPH IO-,WASHINGTON, D c.

V G. H. SCOTT. soouame MACHINE.

APPLICATION FILED APR. 29, 1911.

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G. H. SCOTT.

SCOURING MACHINE.

APPLICATION FILED APR.29, 1911.

Patented Nov. 19, 1912.

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CHARLES H. SCOTT, 0F MINNEAPOLIS, MINNESOTA.

SCOURING-MACHINE.

Specification of Letters Patent.

Patented Nov. 19, 1912.

Application filed April 29, 1911. Serial no. 624,164.

To all whom it may concern:

Be it known that I, CHARLES H. Soorr, of Minneapolis, Hennepin county, Minnesota, have invented certain new and useful Improvements in Scouring-Machines, of which the following is a specificationf My invention relates to machines for scouring grain or removing the dust, dirt and smut therefrom, and the object of the invention is to provide for an increased and more uniform ventilation of the scouring case.

A further object is to provide an outer case or cylinder of simple construction and one which will be very durable.

Other objects of the invention will appear from the following detailed description.

My invention consists generally in a scouring case composed of hoops or rings secured together to form a cylinder with means spacing the hoops or rings apart to form cracks or openings through which the dust and fine refuse material is sucked as set forth in the claims.

Further the invention consists in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.

In the accompanying drawings forming part of thisspecification, Figure 1 is a vert-ical sectional'view of a scouring machine embodying my invention, Fig. 2 is a transverse sectional view through the scouring case or outer cyllnder, Flg. 31s a new of the outslde of the scouring case, showing the flared outer portions of the cracks between the hoops of the case, Figs. 4, 5 and 6 are detailviews showing the construction of the case and the form of the hoop, Fig. 7 is a detail view showing a means for spacing the hoops to form the cracks bet-ween them, Fig. 8 is a detail view, illustrating the parallel walls provided at the inner corners of the hoops.

In the drawing, 2 represents the frame of the machine having the usual fan 3 communicating with the chamber 4 in which is mounted a shaft 5. This case consists of an inner cylinder 6 provided with flights 7 for moving the grain and an outer cylinder which embodies my invention, the other parts of the machine being well known and in general use. Heretofore it has been customary to construct this outer cylinder of staves running lengthwise of the cylinder with slots or openings in the staves through which currents of air were established to draw the dust and dirt or smut cleaned ofl the wheat kernels out of the case.

The problem in machines of this kind. has been to obtain a large ventilating surface and at the same time an outer cylinder which will be durable in proportion to its efiiciency. It has been found that the narrow slots or openings in the longitudinal staves are apt to vary somewhat in size in casting and have a tendency to clog and do not afford as much ventilating surface to the case as is really necessary to obtain the best results. To avoid this objection to the ordinary scouring machine, I provide an outer case or cylinder composed of a series of hoops, preferably of cast metal, and for convenience in casting may be made in sections 8 having lugs 9 secured together by a bolt 10. I prefer to provide four of these sections, but do not confine myselfto this number. The longitudinal edges of the sections are ground down so that their abutting edges will be straight, and beveled surfaces 11 are formed in said edges so that when the hoops are assembled and spaced apart the openings or cracks between them will flare outwardly, except near the inner surface of the case, where for a short distance the walls of the openings are substantially parallel with one another.

The object of making the edges of the hoops parallel for a short distance is to prevent any change in the width of the cracks or openings, due to wear of the inner surfaces of the hoop. Obviously, if the walls flared immediately from the inner contiguous corners of the hoop, the wear would immediately result in an increase in the width of the cracks or openings, which, of course, would be undesirable, and would necessitate the more frequent renewal of the hoops.

The inner faces of the hoops are substantially flat in cross section, that is, from edge to edge while longitudinally of said hoops said surface is continuous and concentric with the aXis ofthe cylinder. By this shaping of the inner faces of the hoop and by the spacing thereof, I have provided a scouring device wherein the wheat or other grain may be thoroughly cleansed and freed from dust and dirt, without breaking off the ends of the kernels. Any suitable means may be provided for securing these hoops together,

but I prefer to provide bosses or hubs 12 on the outer walls of the hoops having holes therein to receive the binding rods 13 which secure the hoops together, washers 1 1 being placed between the bosses to provide the desired spaces between the hoops. The width of these spaces may, of course, be increased or decreased according to the thickness of the washers.

The feature of varying the width of the cracks between the rings by using washers of different thickness I have found. to be important in this case, as it allows me to readily adapt the machine to the condition of the grain. When the kernels are large and plump, the cracks may be increased in width, and in dry seasons, when the kernels are shriveled and small, thinner washers may be used between the rings, so that the width of the cracks will be decreased.

I have also provided the inner faces of the hoops or rings with a series of spaced recesses or depressions 15. These recesses are preferably formed with curved or rounded bottoms so as to avoid any sharp shoulders which would tend to prevent the free movement of the kernels of grain or cause the same to break. These recesses operate to separate the body of the grain, and prevent it from sliding around the casing without being suitably agitated.

By my construction wherein the hoops or rings have outwardly projecting lugs so that the hoops or rings may be held spaced from each other by suitable washers, I have provided a construction wherein the crack or space between the edges of the rings is continuous, and this will allow the kernels to slide freely along the crack or space between the rings without clogging, or without being broken.

The hoops or rings may be made of suitable width, it being understood that the larger the number of hoops employed the greater the number of openings or cracks and the more perfect the ventilation of the case.

In various ways the details of construction of this scouring case may be modified without departing from the scope of my invention.

I claim as my invention 1. A scouring machine including a horizontal container composed of a series of rings placed edge to edge, means for securing said rings in spaced relation to each other, whereby narrow cracks are formed between the rings, the inner faces of said rings being straight in cross section and disposed in the same plane throughout their entire width and having a plurality of spaced depressions with rounded bottoms formed therein.

2. A scouring machine including a cylinder composed of a series of rings placed edge to edge, means for securing said rings in spaced relation to each other whereby continuous annular cracks are formed between said rings, the opposing edges of said adjoining rings having inner substantially parallel surfaces, the inner surface of the rings being straight in cross section and disposed in the same plane throughout their entire width. 7

3. A scouring machine including a horizontal container composed of a series of rings placed edge to edge, means for securing said rings in spaced relation to each other whereby continuous annular cracks are formed between said rings, the opposing edges of said adjoining rings having inner substantially parallel surfaces, the inner surface of the rings being straight in cross section and disposed in the same plane throughout their entire width, said inner surface of each ring having a plurality of spaced depressions with rounded bottoms formed therein.

4. A scouring machine including a cylinder composed of a series of rings placed edge to edge, means for securing the rings in spaced relation to each other whereby narrow annular cracks are formed between said rings, the opposing edges of the ad'- joining rings having inner substantially parallel surfaces and outer diverging surfaces, the inner surfaces of said rings longitudinally of the cylinder being substantially parallel with the axis thereof, and transversely of the cylinder being concentric with the axis thereof and each of said rings having on its inner face means for scouring the gram.

'5. A scouring machine including a horizontal cylinder having a series of rings placed edge to edge, outwardly projecting bosses carried by the rings, rods passing through the bosses, removable washers between the bosses for separating the rings whereby continuous annular cracks are formed between the adjacent rings, the opposing edges of the adjoining rings having inner substantially parallel surfaces and outer diverging surfaces, the inner surfaces of the rings longitudinally of the cylinder being substantially parallel with the axis of the cylinder, and transversely of the cylinder being concentric with the axis of the cylinder, and having a plurality of spaced depressions formed therein.

6. A scouring machine including a container composed of a series of rings placed edge to edge,each of said rings being formed inner faces substantially straight in cross section, and each ring having on its inner face means for scouring the grain.

7. A scouring machine including a con- 5 tainer composed of a series of rings placed edge to edge, each of said rings being composed of a series of comparatively narrow sections placed end to end, each ring section having fiat longitudinal edges which lie in 10 the same plane as the corresponding edges of the other sections of the ring on the same side of the ring, whereby the distance between the opposing edges of adjacent rings will be substantially uniform at all points, and means for securing said rings in spaced relation to one another.

In witness whereof, I have hereunto set my hand this 18 day of April 1911.

CHARLES H. SCOTT. Witnesses:

GENEVIEVE E. SoRENsEN, EDWARD A. PAUL.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

